Soils and weathering

What climate conditions would favor frost action the most?

• Extreme cold for long periods of time
• Extreme heat for long periods of time
• Many temperature changes above and below freezing
• Many temperature changes above and below 100 dgrees

How does freezing water cause the weathering of rocks?  The freezing water—

• keeps the rocks in place
• makes the rocks last longer
• expands cracks and breaks rocks
• causes rocks to fall in landslides

All of the following are causes of physical weathering except...

• plant growth
• wind
• acid rain
• running water

A marble statue is left exposed to the weather.  Within a few years, the details on the statue have begun to weather away.  This weathering probably is caused by...

• oxygen in the air
• carbonic acid in rainwater
• lichens
• abrasion

Which type of climate will have faster chemical weathering?

• Hot and Wet
• Cold and Dry
• Hot and Cold
• Cold and Wet

How do plants weather rocks?

• during photosynthesis
• when roots grow into cracks of rocks and expand the rock
• when the plant moves water from the roots to the leaves

These rocks were made smooth by wind blowing smaller rock particles across their surface.  This is an example of:

• ice wedging
• chemical weathering
• acid rain
• abrasion

This rock may chemically weather easily because is has many spaces or holes in it that allow water to seep through it called

• porosity
• abrasive
• erosion
• unchangable

A metal statue slowly turning green after years of being outside is an example of:

• mechanical weathering
• chemical weathering

What is HUMUS made from?

• Chick-Peas
• The remains of decayed plants and animals
• Beans
• Cheese